Process of obtaining metallic effects on fabrics containing organic derivatives of cellulose



Patented Dec. 11, 1928.-

UNITED STATES RENE CLAVEL, F BASEL-AUGST, SWITZERLAND.

rnoonss or OBTAINING-METALLIC 'nrrncrs 0N FABRICS CONTAINING oReaNmDERIVATIVES or CELLULOSE.

No Drawing.

The object of this invention is to provide Another object of theinvention is to obtain fabrics which very closely resemble old Venetianmetallic tapestries ofthe Rena-issance period. Another object oftheinvention is to provide a process for treating fabrics of orcontaining organic derivatives of cellulose with mineral powders or dyestuff powders to obtain variegated effects on the fabric.

There are several different methods for ob-' taining metallic silver and,gold effects on cloth known today. Of these processes the one mostoften employed is one wherein a paste of gum or gums, such as arecommonly employed in printing processes, and a metallic powder isprinted on the fabric ahd then gxed by a subsequent steaming operation.

f if desired the fine metallic powder, in

' paste form, is spread on thefabric and the latter is then subjected toa calendering operation. The above steaming or calender- 2 ingoperations serve to fix the metallic powder in the fabric. It hasnowbeen discovered by the ap-phcant that fabrics containing organicderivatives of cellulose can be treated so as to obtain unusual metalliceffects. In the old processes no change in the structure of the fabricis brought-about whereas in the applicants process the structure of thefabric is materially altered and novel and unexpected effects areobtained as a result of this change.

pletely, depending on the conditions of treat-- ment, the organicderivatives of cellulose and enables the metallic or mineral powder orother material to be fixed completely or permanently bythe subsequentdrying process.

The fabric after the above treatment can be dyed and/or calendered asdesired.

The followin examples illustrate two processes or met ods of carryingout my invention on fabric made of a heavy crepe of 56 cotton andcellulose acetate.

Application filed April 6,

192s. Serial No. 100,179.

Example 1.500 grams of gum arabic are dissolved in a litre of water andto this is added 5 litres of acetone. 'To this mixture, which is wellstirred,-so as to form an emulsion, 200 grams of powdered goldsubstitute is added. The mixture is Well stirred until the powderedmetal .(or other material which may be added) is entirely and upiformlydistributed in' the resulting paste. This paste is then uniformlyapplied to the fabric by means of a vertical doctor blade and the fabricis then very rapidly dried. This drymg serves to fi-x'the metallicpowder in the fabric. After the fabric is completely dried it can be'dyed, preferably at high temperatures (80 to 100 C.) with a mixture ofcotton and cellulose acetate dyestuffs or with cotton dyestuffs alone oreven with cellulose acetate dyestufls alone. The fabric at this stage ofthe process presents a uniform solid'and unbroken metallic surface duetothe: fixing of the metallic powdertherein.

, The fabric, after the above treatment, is then washed and put on astretching frame and greatly stretched. This stretching causes some ofthe partiallyor completely dissolved cellulose acetate threads to breakand that portion of fabric which has been'pr-eviously dyed shows itselfin the dyed. shade. That is tosay the dyed portions of the fabricappearv as a background to the metallic surface, which surface as aresult of the stretching operation is no longer a continuous solid massbut is "broken up to a considerable d egree; -After thestretchingtreatment, as above set out, the

fabric may be calendered if desired in order to give it a smootherappearance andfeel.

Example 2.--500 grams of Sericose are dis solved in a mixture of 6litres of acetone, 1 litres of ethyl alcohol and 2% litres of benzol. Tothis solution is added 300 grams of powdered gold or silver substituteand the mi xture wellstirredunti-l the powdered metal is entirely andevenly distributedin the re-- sulting paste. The fabric is then treatedwith the paste as described in Example No. 1. The above examples of theprocess canbe or mixture of powders, suitable for obtainingthe effectsdesired-thusfor example powdered-bronze and powdered aluminum can beused where one Wishes both gold and silver effects on the same fabric.Also the fabric treated may contain fibres of more than one derivativeof cellulose that is fibres of both modified by substituting any otherpowder-,

esters and ethersof cellulose. Nor is a mixed fabric of cotton and anorganic derivative of cellulose the only'class of mixed fabric which canbe treated by the applicants process. Mixed fabrics'of wool andorganic'derivatives of cellulose or of real silk and r-- garlicderivatives of cellulose or of rayon and organic derivatives ofcellulose, etc. can

I it

. cants process to a cellulose acetate.-

also be treated by this process toobtain the peculiar and characteristicmetallic effects resulting from the-application of the 'appli' mixedfabric of cotton and Instead of metallic powders, mineral powders; suchas ultra-marine, 11'011 oxide, etc.

"or insoluble dyestuff powders can be mixed y in the paste. Alsodifferent solvents of high boiling points and softening agents for the ialso enables one to obtain fabrics. of varying degrees of softness. ,Asexamples of suchhigh boiling point solvents or softeners, the

particular cellulose derivatives in the fabric roan be utilized. Thismakes it possible to obtain different effects and appearanceson thefabric on which the powders are fixed and following are mentionedLTurkey red oil,

. tria'cetin, tricresylphosphate and mono-oil.

, The above examples are merely illustrative of the ap licants'invention and his inven-.

f "to obtain metallic orsiinilar effects thereon which comprisesapplying to the surface of i 7 ing thepaste on the fabric a s 2. Aprocess for treating'fabricscontaining the fabrica paste containing agum, a solvent for the-organicv derivatives in the fabric and aflpowdersuitable for obtaining the desired e e and fix-v cts to forma thinbreakable film,

"an organic derivative of cellulose in order to obtain: metallic r'similar effects; thereon which\ comprises applying to the surface of thefabric a paste containing a'gum,-a solvent for the organicderivativeinthe fabricand a mineral powder suitable for obtaining thedesired effects to form a thin'breakable'film'-{ '10. A'processfortreatingfabrics contain-.

A and fixing the pasteon the'fabric. v

3. "A process for treating fabrics contain; mg an organic derivative ofcellulose in o'r' der to obtain metallic or similar effects there'-' onwhich comprises supplying to the surface of the fabric a pastecontaining a gum, a solvent for-the organic derivative in the. fabricand a metallic 'wder to form'a thinbreak-"cforobtainingthe'desired'eifects and, drying ablefilm and xing the paste'onthe fabric.

4. A process for treating" fabrics containing an organic derivative ofcellulose inorder to obtain metallic or similar effects thereon whichcomprises applying to the surface of the fabric a paste contamin a um; asolvent for the organic derivative m-t e fabric and powdered goldto'form a thin breakable film-- and fixing the paste on the fabric,

5. A process for treating fabrics contain ing an organic esterofcellulose in order to 'obtain metallic or similar effects thereonwhich comprises applying to the surface of a the fabric a pastecontaining a gum, a solvent for the organic ester and a powdersuitable'"for obtaining desired effects to form a thin. 7

breakable film and fixing the paste on the fabric.

6. A process for treating fabrics containing cellulose acetate in orderto obtain metalgl lie or similar effects thereon which comprisesapplying to the surface of the fabric a paste containing a gum, asolvent for the cellulose acetate and a mineral powder suitable forobtainin desiredefiects to form a thin break- I able fi m and fixing thepaste on the fabric.

7 A process for treating fabrics containing an organic derivativeof'cellulose yarn in order to obtain metallic or slmilar effects thereonwhich comprises applying to the surface of the fabric a paste containingum arabic and acetone and a powder suitable for obtainingthe desiredeffectsto form a thin breakablefilmand fixing the-paste-on the fabrig.

8.. A ing an organic derivative of. cellulose and yarnofother fibre inorder to obtain metallic vorsimilar effects thereon which comprisesapplying to the surface of the fabrica paste. containing a gum, asolvent for' the organic derivative inv the fabric and a powder suitablefor obtaining the desired effects and dryprocess for'treating fabricscontain-1 ing the fabricv to form a thin'breakable film, thereby fixingthepaste. on thefabrica,

. '9. A .process for treating fabrics c'ontaining an organic derivativeof cellulose and yarn of other fibre in order to obtain metallie orsimilar effects thereon which comprises applying to the surface of thefabric a paste containing a gum, a solv'entfor the organic derivativeinthe fabric and a powder suitable forobtaining the desired effects-and,drying the fabric to form athin breakable.

filmy thereby'lfixing the paste on! the fabric and then dyeing thefabric witlrthe powder] v I v v fixed thereon.

plying to the surface of the fabric a pasteconrivative in the fabric anda powder suitable the fabric to form a thin breakable film, therelfyfixing the paste on the fabric and then dyein at elevated temperatures,the fabric witht epowder fixed thereon. 1 '11; A process for treating.fabrics contain-:

ing an organic derivative'of cellulose in or der toobtain metallic orsimilar efiectsthereon,'which comprises applying to the surface of thefabric a paste containing a gum, a solvent for the organic derivative inthe fabric and a powder suitable for obtaining the desired effects,quickly drying the fabric thereby fixing the paste on the fabric, andsubsequently stretching the fabric, causing some of the partially orcompletely dissolved threads to break.

12. A process for treating fabrics containing an organic derivative ofcellulose in order to obtain metallic or similar effects thereon whichcomprises applying to the surface of the fabric a paste containing agum, a solvent for the organic derivative in the fabric and a powdersuitable for obtaining the desired effects and, quickly dryin thefabric, there by fixing the paste on the dabric, then dyeing the fabricwith the powder fixed thereon and subsequently stretching the fabric,causing some of the partially or completely dissolved threads to break,thus exposing portions of the dyed fabric.

13. A process for treating fabrics containing an organic derivative ofcellulose in order to obtain metallic or similar effects thereon whichcomprises applying to the surface of the fabric a paste containing agum, a solvent for the organic derivative in the fabric and a powdersuitable for obtaining the desired effects, and quickly drying thefabric,thereby fixing the paste on the fabric, then dyeing the fabricwith the powder fixed thereon, subsequently stretching the fabriccausing some of the partially or completely dissolved threads to break,thus exposing portions of the dyed'fabric and iinally calendering thestretched fabric.

14. A process for treating a mixed fabric of cotton and celluloseacetate yarns in order to obtain metallic or similar effects thereonwhich comprises applying to the fabric a paste containing a gum, asolvent for the celluloseacetate and a powder suitable for obtaining thedesired effects to form athin film and fixing the paste onthe fabric.

15. A process for treating a mixed fabric of cotton and celluloseacetate yarns in order to obtain metallic or similar effects thereonwhich comprises applying to the fabric a paste containing a gum, asolvent for the cellulose acetate and powdered gold to form a thin filmand fixing the paste on the fabric.

16. A process, for treating a mixed fabric of cotton and celluloseacetate yarns in order to obtain metallic or similar effects thereonwhich comprises applying to the surface of the fabric a paste containinga gum, a solvent for the cellulose acetate and a mineral powder suitablefor obtaining the desired effect paste on the fabric to form a thinfilm, and

then dyeing the fabric, with the powder fixed thereon, at elevatedtemperatures.

18. A process for treating a mixed fabric of cotton and an organic esterof cellulose in order to obtain metallic or similar effects thereon.which comprises applying to the surface of the fabric, a pastecontaining agum, a solvent for the cellulose ester, and a powdersuitable for obtaining the desired effect, quickly drying the fabric,thereby fixing the paste on the fabric, dyeing the fabric with thepowder fixed thereon and subsequently stretching the fabric, causingsome of the partially or completely dissolved threads to break thusexposing portion of the dyed fabric.

19. A mixed fabric containing an organic derivative of cellulose havinga metallic powder fixed therein in the form of a thin breakable film andpresenting a metallic efiect.

20. A mixed fabric of cotton and an organic derivative of cellulosehaving a metallic powder fixed therein in the form of a thin breakablefilm and presenting a metallic effect.

21.A mixed fabric of cotton and cellulose acetate having a metallicpowder fixed therein and presenting a metallic effect in the form of abroken thin film similar to old Venetian metallic tapestry.

22. Process of treating a fabric, which fabric has a thin breakable filmof metallic powder fixed thereon comprising dyeing the said fabric. V

23. Process of treating a fabric which fabric has a thin breakable filmof metallic powder fixed thereon comprising stretching the fabric tocause part of the metallic film to break. v

In testimony whereof, I have hereunto subscribed my name.

RENE CLAVEL.

